Lockheed Martin flipped the switch on its first (still Earth-bound) GPS III satellite earlier this year, and it's now announced that it's completed functional testing on the satellite's key electronic systems. In a press release, the company says those systems, ranging from navigation and control to communications, are all "functioning normally and ready for final integration with the satellite's navigation payload," and that the satellite remains on track for deliverly to the Air Force in 2014. As previously detailed, the satellites themselves are promising to deliver a range of improvements over current GPS technology to civilian and military users alike, including three times greater accuracy and an eight-fold increase in anti-jamming capabilities, which Lockheed Martin says is designed to "outpace growing global threats that could disrupt GPS service."